CN112313586A - Automation system, operating method for an automation system, and computer program product - Google Patents

Automation system, operating method for an automation system, and computer program product Download PDF

Info

Publication number
CN112313586A
CN112313586A CN201980035112.1A CN201980035112A CN112313586A CN 112313586 A CN112313586 A CN 112313586A CN 201980035112 A CN201980035112 A CN 201980035112A CN 112313586 A CN112313586 A CN 112313586A
Authority
CN
China
Prior art keywords
control unit
network
vlan
component
communication interface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201980035112.1A
Other languages
Chinese (zh)
Inventor
U·肖尼
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Selectron Systems AG
Original Assignee
Selectron Systems AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Selectron Systems AG filed Critical Selectron Systems AG
Publication of CN112313586A publication Critical patent/CN112313586A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0423—Input/output
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L15/00—Indicators provided on the vehicle or vehicle train for signalling purposes ; On-board control or communication systems
    • B61L15/0018—Communication with or on the vehicle or vehicle train
    • B61L15/0036—Conductor-based, e.g. using CAN-Bus, train-line or optical fibres
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
    • G05B19/052—Linking several PLC's
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
    • G05B19/054—Input/output
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM]
    • G05B19/4185—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM] characterised by the network communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
    • H04L12/40013—Details regarding a bus controller
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40169—Flexible bus arrangements
    • H04L12/40176—Flexible bus arrangements involving redundancy
    • H04L12/40189—Flexible bus arrangements involving redundancy by using a plurality of bus systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
    • H04L12/4645—Details on frame tagging
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/31—From computer integrated manufacturing till monitoring
    • G05B2219/31198—VPN virtual private networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40208—Bus networks characterized by the use of a particular bus standard
    • H04L2012/40215—Controller Area Network CAN
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/4026—Bus for use in automation systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40267—Bus for use in transportation systems
    • H04L2012/40293—Bus for use in transportation systems the transportation system being a train
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

The present invention relates to an automation system, an operating method for an automation system and a computer program product, and in particular to an automation system, a method and a computer program product for communication between components of an automation system which are connected to one another via a backplane bus, wherein the components can exchange data directly with one another without sending the data via a host. An automation system (1) is disclosed, having a backplane bus (62), a first component (2), a second component (4), wherein the first component (2) has: a first control unit (22) which is provided for controlling and monitoring the first component (2) and assumes the function of a superordinate control unit for the automation system (1); a first communication interface (42) connectable with a first segment of a train control and management system network (14); a second communication interface (45) connected to the backplane bus (62); a first network switch (32) that connects the first communication interface (42), the second communication interface (45), and the control unit (22) to each other so that data communication is possible according to an Ethernet protocol; wherein the second component (4) has: a second control unit (24) which is provided for controlling and monitoring the second component (4); a third communication interface (46) connected to a second segment of the train control and management system network (14); a fourth communication interface (47) connected to the backplane bus (62); a second network switch (34) that connects the third communication interface (46), the fourth communication interface (47), and the second control unit (24) to each other so that data communication is enabled according to an ethernet protocol, wherein the first network switch (32) and the second network switch (34) are provided for establishing and processing a VLAN according to IEEE802.1Q primary tagging and are provided for forming and processing a VLAN according to IEEE802.1 ad secondary tagging; the train control and management network (14) forms a first VLAN (V1) which is once marked according to IEEE802.1Q, and a control unit (22) is connected to the first VLAN to be used as a terminal device of the train control and management network (14); a VLAN (V3) labeled once in accordance with IEEE802.1Q is established between the first control unit (22) and the second control unit (24) via the backplane bus 62, via which the control unit (22) is able to communicate with and control the control unit (24), and a first VLAN (T1) labeled twice in accordance with IEEE802.1 ad is established between the first network switch (32) and the second network switch (34) via the backplane bus (62).

Description

Automation system, operating method for an automation system, and computer program product
Technical Field
The present invention relates to an automation system, an operating method for an automation system and a computer program product, and in particular to an automation system for communication between components of an automation system which are connected to one another via a backplane bus, wherein the components can exchange data directly with one another without sending the data via a host, a method and a computer program product.
Background
In the prior art, automation systems (referred to below as "TCMS") are known, for example, for the automated Control of functions of a rail vehicle assembly, in particular for the Control and management of a rail vehicle assembly, which automation systems are formed in a modular manner from a plurality of components. Here, a plurality of components are usually mounted in a common housing. If these components are to communicate with one another, the housing is usually equipped with a printed circuit board (also referred to as a "Backplane") which is provided with an interface which is designed to be connected to the components when they are inserted into the housing.
The components can be connected in different forms via the interface. In the case of star-wiring, the connections themselves for a plurality of identical components lead to the interfaces of the central component, respectively. The respective components can then not physically communicate directly with one another, but only with the central component. Communication between the components is performed through a central component that acts as a repeater.
If the interfaces share a communication medium, i.e. all interfaces are connected via the same or continuous conductor circuit, they form a Bus ("Backplane Bus" or "Backplane Bus"). Since it is possible for transmission disturbances or even damage to the connected components to occur when a plurality of components access the bus simultaneously in a transmitting manner, a mechanism for bus access arbitration must be provided in the communication protocol used in this case to control which of the communication partners connected to the bus gains access to the communication medium when a plurality of communication partners want to access the bus simultaneously. For communication via star wiring or backplane bus, different communication protocols are known, such as CAN bus according to ISO 11898, Ethernet according to IEEE 802.3, ANSI/EIA/TIA-232-F/RS-422, ANSI/EIA/TIA-422-B-1994/RS-485, RS-232 according to ANSI/EIA/TIA-485, USB, PCI and the like.
Alternatively, automation systems are known in which the backplane bus function is not provided by a correspondingly designed printed circuit board, but in which the individual components are connected to one another by single-core or multi-core flexible cables. In particular, in these automation systems, all components need not be accommodated in a common housing, but rather can be arranged at different locations of the rail vehicle.
In the prior art, automation systems with star cabling or in particular with a backplane bus are generally used when using the CAN bus communication protocol. The automation system is designed such that a component controls the communication between the components as a superordinate component (host). This automation system allows for isolating communications between individual components from other components such that a component with a fault cannot unauthorized interfere with communications between other components.
The automation systems of the prior art have the following problems: the superordinate component participates in each communication process, which leads to an overload of the superordinate component and, if the superordinate component fails, to a failure of the automation system if the superordinate component fails.
Furthermore, in the known automation systems, no components having further communication interfaces can be provided for external systems, so that data cannot be transferred or transmitted between the external systems via the interfaces of the different components.
Disclosure of Invention
It is therefore an object of the present invention to provide a method that enables direct communication between components, between a component and an external system or between external systems, or reduces the load on a host.
The object is achieved by an automation system according to claim 1, an operating method for an automation system according to claim 5 and a computer program product according to claim 9. The embodiments of the dependent claims represent further advantageous developments of the invention.
An automation system is disclosed having a backplane bus, a first component, a second component, wherein the first component has: a first control unit, which is provided for controlling and monitoring the first component and assumes the function of a superordinate control unit for the automation system 1; a first communication interface connectable with a first segment of a train control and management system network; the second communication interface is connected with the backboard bus; a first network switch that connects the first communication interface, the second communication interface, and the control unit to each other such that data communication is possible according to an ethernet protocol; wherein the second component has: a second control unit arranged to control and monitor the second component; a third communication interface connected to a second segment of the train control and management system network; the fourth communication interface is connected with the back plate bus; a second network switch that connects the third communication interface, the fourth communication interface, and the second control unit to each other such that data communication is performed according to an ethernet protocol, wherein the first network switch and the second network switch are provided for establishing and processing a VLAN according to IEEE802.1Q primary tagging and are provided for forming and processing a VLAN according to IEEE802.1 ad secondary tagging; the train control and management network forms a first VLAN (V1) according to IEEE802.1Q primary tag, to which a control unit is connected as a terminal device of the train control and management network; a VLAN once tagged under IEEE802.1Q is established between the first and second control units via a backplane bus (V3), by which the control units can communicate with and control the control units, and a twice tagged first VLAN under IEEE802.1 ad is established between the first and second network switches via the backplane bus (T1).
The disclosed automation system allows multiple components to communicate with each other over a backplane bus without having to direct data through a central location (host), thereby reducing the workload of the central location.
Furthermore, an automation system is preferably disclosed, wherein a first section of the train control and management system network comprises a single terminal device of the train control and management system network or comprises a sub-network via which a plurality of terminal devices of the train control and management system network are connected, and a second section of the train control and management system network comprises a single terminal device of the train control and management system network or comprises a sub-network via which a plurality of terminal devices of the train control and management system network are connected.
Furthermore, it is preferably provided that, in the automation system, the first component also has: a fifth communication interface connected to a first section of a communication network forming a second VLAN (V2) labeled once in accordance with IEEE802.1Q, to which a control unit is connected as a terminal device; and the automation system has a third component, wherein the third component has: a third control unit, which is provided for controlling and monitoring the third component; a sixth communication interface connected with the first section of the communication network; a seventh communication interface, connected to the backplane bus; a third network switch, which connects the sixth communication interface, the seventh communication interface and the third control unit to one another in such a way that data communication is possible according to the ethernet protocol, wherein a VLAN (V3) labeled once according to IEEE802.1q is established between the first control unit and the third control unit via the backplane bus, the first control unit is able to communicate with the third control unit via the VLAN and controls the third control unit, and a second VLAN (T2) labeled twice according to IEEE802.1 ad is established between the first network switch and the third network switch via the backplane bus.
Furthermore, an automation system is preferably disclosed, wherein: the first section of the communication network comprises a single terminal device of the communication network or comprises a sub-network via which a plurality of terminal devices of the communication network are connected, and the second section of the communication network comprises a single terminal device of the communication network or comprises a sub-network via which a plurality of terminal devices of the communication network are connected.
Furthermore, an automation system is preferably disclosed, wherein the automation system has a fourth component, wherein the fourth component has: a fourth control unit provided for controlling and monitoring the fourth component and serving as a terminal device for the CAN bus; an eighth communication interface connected to the first segment of the CAN bus and the fourth control unit; a ninth communication interface connected with the backplane bus; a fourth network switch, which connects the ninth communication interface and the fourth control unit to one another in such a way that data communication is possible according to the ethernet protocol, wherein a VLAN (V3) labeled once in accordance with IEEE802.1Q is established between the first control unit and the fourth control unit via the backplane bus, via which VLAN the first control unit can communicate with the fourth control unit and control said fourth control unit.
Furthermore, an operating method for an automation system is disclosed, having the steps: establishing a VLAN (V3) via the backplane bus between the first control unit and the second control unit, the VLAN being tagged once in accordance with ieee802.1q, via which the control unit is able to communicate with and control the control unit; establishing a first VLAN tagged twice as IEEE802.1 ad between the first network switch and a second network switch via a backplane bus (T1); data traffic according to an IEEE802.1Q once tagged first VLAN (V1) is transmitted between the first network switch and the second network switch over a backplane bus over the twice tagged first VLAN (T1).
Furthermore, an operating method for an automation system is preferably disclosed, which operating method furthermore has the steps: establishing a VLAN (V3) per IEEE802.1Q one-time tag between the first control unit and a third control unit via a backplane bus via which the first control unit is able to communicate with and control the third control unit; establishing a second VLAN tagged twice as IEEE802.1 ad between the first network switch and a third network switch via a backplane bus (T2); data traffic according to an IEEE802.1Q once tagged second VLAN (V2) is transmitted between the first network switch and a third network switch over a backplane bus over the twice tagged second VLAN (T2).
Furthermore, an operating method for an automation system is preferably disclosed, which operating method furthermore has the steps: a VLAN (V3) according to IEEE802.1Q primary tagging is established between the first control unit and a fourth control unit via a backplane bus, via which VLAN the first control unit is able to communicate with and control the fourth control unit.
Furthermore, a computer program product is disclosed, which is provided to control an automation system in such a way that one of the aforementioned operating methods is carried out.
Drawings
Embodiments of the method according to the invention are explained with reference to the following figures. This embodiment is presented here as an exemplary implementation of the method according to the invention, which is not limited to the inventive solution as defined in the claims.
Fig. 1 shows a schematic view of a first embodiment of the invention.
Fig. 2 shows a schematic diagram of the virtual network V3 in the first embodiment.
Fig. 3 shows a schematic diagram of the virtual network V1 in the first embodiment.
Fig. 4 shows a schematic diagram of the virtual network V2 in the first embodiment.
Fig. 5a and 5b show two variants of a flow chart of the method according to the invention.
Fig. 6 shows a schematic view of a second embodiment of the invention.
Detailed Description
The structure of a first embodiment of an automation system for the method according to the invention is explained with reference to fig. 1.
The automation system 1 is a system for automating a technical process in the environment of controlled devices. In the present case, the automation system is a system for the automated control of functions of a rail vehicle combination, such as opening and closing train doors, controlling air conditioning, lighting, drive and delay devices, issuing notifications, etc.
The automation system has a housing. In which a first component 2, a second component 4, a third component 6 and a fourth component 8 are arranged. In addition, a rear printed circuit board 60 (also referred to as a "Backplane") is provided in the housing.
The Backplane 60 includes a Backplane Bus 62 (also referred to as a Backplane Bus).
The first component 2 has a network Switch 32 (also called "Switch"). A plurality of network participants can be connected to one another via the network switch 2. The network switch 2 uses ethernet according to the standard IEEE 802.3 as communication protocol. Furthermore, the network switch 2 is configured to transmit data traffic as a virtual local area network ("VLAN") tagged once according to IEEE802.1Q ("tagged VLAN"). Further, the network switch 2 is provided for transmitting data traffic as a nested VLAN ("doubly tagged VLAN") doubly tagged according to IEEE802.1 ad.
The first component 2 has a first communication interface 42, a second communication interface 44 and a third communication interface 45, which are connected to the network switch 32 and are provided for transmitting data communications according to the ethernet protocol. The first communication interface 42 is connected to the multimedia network 12. The second communication interface 42 is connected to the Train Control and management System Network 14(TCMS Network). The third communication interface is connected to the backplane bus 62 of the back printed circuit board 60.
The first assembly 2 has a control unit 22. The control unit 22 is connected to the network switch 32 and is provided for communication with said network switch by means of the ethernet protocol. The control unit 22 controls and monitors the first component 2. The control unit also assumes control of the communication network within the automation system and is used here as a superordinate control unit ("master") of the automation system 1. Further, the control unit is a terminal device in a train control and management system. The control unit 22 is arranged for transmitting data traffic as a VLAN according to IEEE802.1 ad dual tagging.
The second component 4 is constructed substantially as the first component 2. The differences from the assembly 2 are explained below. The remainder is referred to the description of the first component 2. The second module 4 has only two communication interfaces 46, 47, which are connected to the network switch 34. The second component is connected to the TCMS end devices 18, such as train doors, of the train control and management system network 14 via the communication interface 46. The second component 4 is connected to the backplane bus 62 via a communication interface 47. The control unit 24 controls and monitors the second assembly 4.
The third component 6 is constructed substantially as the second component 4. The differences from the assembly 4 are explained below. The remainder is referred to the description of the second component 4. The third component 6 has a communication interface 48, via which the third component 6 is connected to the terminal device 18 of the multimedia network 12, for example a screen for displaying images and image sequences/movies.
The fourth component 8 is constructed substantially as the second component 4. The differences from the assembly 4 are explained below. The remainder is referred to the description of the second component 4. The fourth component 8 has a communication interface 40, which is provided for connecting to a CAN bus and for transmitting data communications in accordance with ISO 11898. The control unit 28 is connected to the communication interface 40 and operates as a terminal of a CAN bus. In addition, the control unit 28 is connected to the network switch 38 and to the backplane bus 62 via the network switch and the communication interface 50. The control unit 28 controls and monitors the fourth component 8. The control unit 28 CAN communicate with further controllers or terminals, not shown, via the CAN bus 15.
Fig. 2 illustrates a virtual communication network V3 within the automation system.
The communication network V3, which is shown by a solid line in fig. 2, is used for communication between the control unit 22, which functions as a superordinate control unit, and the control units 24, 26 and 28. For this purpose, a doubly labeled VLAN T3 according to IEEE802.1 ad is established between the network switches 32, 34, 36 and 38, via which VLAN T3 a passage of the communication network V3 is created. For this purpose, the data packets of the ethernet protocol between the network switches are provided with an additional identifier for the VLAN and an identifier which allows the network switches 32, 34, 36 and 38 participating in the data communication to assign the data packets to the VLAN and to ensure that: only authorized end devices, here control units 22, 24, 26 and 28, participate in data communication via VLAN V3. The network switch does not transmit data traffic from VLAN V3 or tunnel T3 to another end device, such as multimedia end device 16 or TCMS end device 18.
Fig. 3 shows a virtual communication network V1 within the automation system.
A virtual communication network V1, shown by a solid line in fig. 3, is used for communication between the terminal devices of the train control and management system network 14. Since the train control and management system network 14 is already designed as a VLAN and therefore the data packets of the ethernet protocol are provided with a tag according to IEEE802.1Q and a VLAN identification code, a VLAN according to IEEE802.1Q cannot be established in order to build a VLAN between the control unit 22, the network switch 32 and the network switch 34. To extend data communications of VLAN V1 across multiple components, a doubly labeled VLAN according to IEEE802.1 ad needs to be established between control unit 22, network switch 32, and network switch 34. Placing the second tag and the second VLAN identification code in front of the VLAN tag of the train control and management system network 14V1 when transmitting data packets between the control unit 22, the network switch 32 and the network switch 34 enables configuration of the data packets to additional nested VLANs and thus establishment of a communication channel T1 between the control unit 22, the network switch 32 and the network switch 34. This allows the control unit 22, network switches 32 and 34, participating in the data communication, to configure the data packet to a VLAN and ensure that: only authorized end devices, here communication interfaces 44 and 46 and control unit 22, participate in data communication via VLAN V1. The network switch does not transport data traffic from VLAN V1 to another end device, such as multimedia end device 16 or multimedia network 12. The control unit 22 likewise forms the terminal of the TCMS network 12 and assumes the functions of a superordinate control unit.
Fig. 4 shows a virtual communication network V2 within the automation system.
The virtual communication network V2, shown by a solid line in fig. 4, is used for communication between the terminal devices of the multimedia network 12. Since multimedia networks 12, such as TCMS networks 12, are already designed as VLANs and therefore packets of the ethernet protocol are provided with a tag and a VLAN identification code according to IEEE802.1Q, a VLAN according to IEEE802.1Q cannot be established in order to construct a VLAN between network switch 32 and network switch 36. To extend data communications of VLAN V2 across multiple components, a doubly labeled VLAN according to IEEE802.1 ad needs to be established between control unit 22, network switch 32, and network switch 36. The configuration of the data packets to further nested VLANs and thus the establishment of a communication channel T2 between the control unit 22, the network switch 32 and the network switch 36 can be achieved by placing a second tag and a second VLAN identification code in front of the VLAN tag of the multimedia network V1 when transmitting the data packets between the control unit 22, the network switch 32 and the network switch 34. This allows the control unit 22, network switches 32 and 36, participating in the data communication, to configure the data packet to a VLAN and ensure that: only authorized end devices, here communication interfaces 44 and 48 and control unit 22, participate in data communications via VLAN V2. The network switch does not transport data traffic from VLAN V1 to another end device, such as TCMS end device 16 or TCMS network 12. In the case of a transmission multimedia data communication, the control unit 22 also assumes the function of a superordinate control unit.
The method of operation of the automation system in this exemplary embodiment is explained with the aid of fig. 5 a.
In the automation system 1 in this embodiment, in a first step S1, a VLAN T3 labeled twice as IEEE802.1 ad is established between the first control unit 22, the first network switch 32, the second network switch 34, the third network switch 36 and the fourth network switch 38 via the backplane bus 62.
In a second step S2, a VLAN labeled once in accordance with IEEE802.1Q, a communication connection unencrypted and assigned to the VLAN or another defined VLAN is established as communication connection V3 between the first control unit 22, the second control unit 24, the third control unit 26 and the fourth control unit 28 via the backplane bus 62 by means of VLAN T3, by means of which the first control unit 22 can communicate with the remaining control units and control these.
In a third step S3, a first VLAN T1 labeled twice in accordance with IEEE802.1 ad is established between the first control unit 22, the first network switch 32 and the second network switch 34 via the backplane bus 62.
In a fourth step S4, data traffic of the first VLAN V1 once tagged according to ieee802.1q is transmitted between the first network switch (32) and the second network switch 34 over the backplane bus 62 through the twice tagged first VLAN T1.
In a fifth step S5, a second VLAN T2, labeled twice as IEEE802.1 ad, is established between the first control unit 22, the first network switch 32 and the third network switch 36 via the backplane bus 62.
In a sixth step S6, data traffic of the second VLAN V2 once tagged according to ieee802.1q is transmitted between the first network switch (32) and the third network switch 34 over the backplane bus 62 through the twice tagged second VLAN T2.
In this embodiment, the respective steps S1, S2, S3, S4, and S5 are performed in the listed order. Or may be in a different order than this. The sequential correlation only exists between steps S1 and S2, and S3 and S4, and S5 and S6, respectively, so that the remaining steps can be performed in other orders or even in parallel. Such a flow is shown in fig. 5 b.
The structure of a second embodiment of an automation system for the method according to the invention is described with reference to fig. 6. This second embodiment is substantially the same as the first embodiment. Differences of the second embodiment from the first embodiment are explained below. All the features and characteristics of the first embodiment can be transferred to the second embodiment, apart from these differences.
Unlike the first exemplary embodiment, the automation system 1' in the second exemplary embodiment has no housing and no rear printed circuit board. The automation system has a first component 2 ', a second component 4', a third component 6 'and a fourth component 8'. These components are disposed in respective modules and do not share a common housing.
Instead of the third communication interface 45 in the first component 2 of the first exemplary embodiment, the first component 2' has a fourth communication interface 451 and a fifth communication interface 452, which are connected to the network switch 32 in such a way that an ethernet communication connection can be established for this purpose. The first module 2' has all the features and functions of the first module 2 of the first embodiment in the remaining parts.
Instead of the communication interface 47 in the second component 4 of the first exemplary embodiment, the second component 4' has a communication interface 471 and a communication interface 472, which are connected to the network switch 34 in such a way that an ethernet communication connection can be formed for this purpose. The second component 4' has all the features and functions of the second component 4 of the first embodiment in the remaining parts.
The communication interface 452 of the first component 2 'is connected with the communication interface 471 of the second component 4' via the first backplane cable 621.
Instead of the communication interface 49 in the third component 6 of the first exemplary embodiment, the third component 6' has a communication interface 491 and a communication interface 492 which are connected to the network switch 36 in such a way that an ethernet communication connection can be established for this purpose. The third assembly 6' has all the features and functions of the third assembly 6 of the first embodiment in the remaining parts.
The communication interface 472 of the second component 4 'is connected with the communication interface 491 of the third component 4' via the second backplane cable 622.
Instead of the communication interface 50 in the fourth module 8 of the first exemplary embodiment, the fourth module 8' has a communication interface 501 and a communication interface 502, which are connected to the network switch 38 in such a way that an ethernet communication connection can be formed for this purpose. The fourth module 8' has all the features and functions of the fourth module 4 of the first embodiment in the remaining parts.
The communication interface 472 of the third component 6 'is connected to the communication interface 501 of the fourth component 8' via a third backplane cable 623.
The method of operation of the automation system 1' in the second embodiment is performed in the same way as in the first embodiment, except that the data communication performed via the backplane bus 62 in the first embodiment is performed via the first backplane cable 621, the second backplane cable 622 or the third backplane cable 623 in the second embodiment. Thus, for example, VLAN T1 is constructed from first network switch 32 to second network switch 34 via backplane cable 621. Further, VLAN T2 is constructed, for example, from first network switch 32 to second network switch 34 via backplane cable 621 and from second network switch 34 to third network switch 36 via backplane cable 622. Further, VLAN T3 is constructed, for example, from first network switch 32 to second network switch 34 via backplane cable 621, from second network switch 34 to third network switch 36 via backplane cable 622, and from third network switch 36 to fourth network switch 38 via backplane cable 623.
In a second embodiment, the components 2 ', 4', 6 ', 8' are arranged in a defined order and connected to one another. This order is exemplary and any other order is possible.
Since the components 2, 2 ', 4', 6 ', 8', the external systems 12, 14, 16, 18 and the ethernet communication interfaces 42, 44, 46, 48 are divided into the networks V1, V2, V3 by means of ethernet VLANs, direct communication between the components 2, 2 ', 4', 6 ', 8' and the external systems 12, 14, 16, 18 can be shown in a targeted manner as required, so that not all communication has to take place via one host, and the load on the host is therefore reduced.
In the above embodiments, the networks V1 and V2 are once-tagged VLANs according to IEEE 802.1Q. Although the above teaching permits the once-tagged VLAN to be transmitted via the backplane bus by means of twice-tagged VLANs according to IEEE802.1 ad, it is not prerequisite for VLANs according to IEEE802.1Q, so that the network V1 or V2 can also be conventional, unencrypted and untagged ethernet data traffic which is not assigned beforehand to a VLAN or to a VLAN which is not assigned by a tag but is defined by a connection point. The same applies to network V3.
In the above embodiments, an automation system having four components is described. However, the automation system may comprise only two or more components, in particular more than four components, depending on the functional requirements.
In the above embodiments, a component having a certain number of interfaces is explained. However, the assembly may have additional interfaces as desired.
In the above embodiments, the automation system is a system for automatically controlling a function of a rail vehicle combination. The invention is not limited to automation systems such as those used for automatically controlling functions of a rail vehicle combination. The automation system may also be an automation system for controlling a processing plant in a processing enterprise or another automation system.
In a second embodiment, the automation system is provided with backplane cables 621, 622, 623, which interconnect the components 2 ', 4', 6 'and 8'. Alternatively, the communication interfaces 451, 452, 471, 472, 491, 492, 501 and 502 can be arranged and designed on the components in such a way that they are connected directly to neighboring components via these interfaces via a stack (Stapeln) and a backplane bus formed outside the components is omitted.
In the above embodiments, the components are provided with a certain functionality. For example, the first component 2, 2 ' is connected to the multimedia network 12 and the TCMS network 14, the second component 4, 4 ' is connected to the terminal equipment 18 of the TCMS network, and the third component 6, 6 ' is connected to the terminal equipment of the multimedia network 12. Furthermore, a fourth component 8, 8' is connected to the CAN bus. It is obvious to the person skilled in the art that the functions can also be distributed differently to the components. For example, one or more terminal devices in the multimedia network 12 or in the train control and management system network 14 or, if control devices are provided, such as control devices in the fourth component 8, 8 ', a CAN bus CAN be connected to the first component 2, 2', the second component 4, 4 'or the third component 6, 6', for example via one or more further communication interfaces.
In the above-described embodiments, only the control unit 22 of the first component 2, 2' is provided for transmitting data traffic as a VLAN according to IEEE802.1 ad dual tagging. This is necessary in embodiments, since the first control unit 22 transmits data traffic via a plurality of, i.e. via doubly labeled VLANs T1, T2 and T3, and the control unit 22 distinguishes the respective VLAN via the labeling of the VLAN. In embodiments, the remaining control units 24, 26, 28 pass data traffic only through VLAN T3, and thus there is no need to distinguish between different doubly labeled VLANs by these control units. Depending on the functional scope, in particular when one component fulfills several functions, the remaining control units 24, 26, 28 can be set up for transmitting data traffic as VLANs according to IEEE802.1 ad double tagging. This is particularly the case when one control unit passes data traffic via more than one doubly labeled VLAN.
One or more terminal devices in the multimedia network 12 or in the train control and management system network 14 can thus be connected to the first module 2, for example, via one or more further communication interfaces.
Since the automation system in this exemplary embodiment is constructed as modular, individual components, in particular the second component 4, the third component 6 or the fourth component 8, can be removed from the automation system without having to perform their functionality and features, and the automation system 1 can be operated in this way.
Further modifications of the invention are possible within the scope of the claims.
The conjunctions … … "and", "or" and "either … … or" are used in accordance with meaning that represents a logical juxtaposition, a logical addition (often "and/or"), or a logical opposition.
List of reference numerals
1 Automation System
2. 2' first component
4. 4' second component
6. 6' third Assembly
8. 8' fourth component
12 multimedia network
14 TCMS network
15 CAN bus network
16 multimedia terminal device (external system)
18 TCMS terminal device (external system)
22. 24, 26, 28 control unit
32. 34, 36, 38 network switch
V1, V2, V3 virtual networks
T1, T2 communication channel
40 communication interface (CAN bus)
42. 44, 45, 46, 47, 48, 50, 451, 452, 471, 472, 491, 492, 501, 502 communication interface (Ethernet)
60 back printed circuit board
62 backboard bus (Ethernet)
621. 622, 623 backboard cable

Claims (10)

1. An automation system (1) having:
a backplane bus (62),
a first component (2) for the first component,
wherein the first component (2) has:
a first control unit (22) which is provided for controlling and monitoring the first component (2) and which assumes the function of a superordinate control unit for the automation system (1),
a first communication interface (42) connectable with a first segment of a train control and management system network (14),
a second communication interface (45) connected with a backplane bus (62),
a first network switch (32) interconnecting the first communication interface (42), the second communication interface (45) and the control unit (22) to enable data communication according to an Ethernet protocol,
a second component (4) for the second component,
wherein the second component (4) has:
a second control unit (24) which is provided for controlling and monitoring the second component (4),
a third communication interface (46) connected with a second segment of the train control and management system network (14),
a fourth communication interface (47) connected to a backplane bus (62),
a second network switch (34) interconnecting the third communication interface (46), the fourth communication interface (47) and the second control unit (24) such that data communication is performed according to an Ethernet protocol,
wherein the first network switch (32) and the second network switch (34) are arranged for establishing and handling a VLAN according to IEEE802.1Q primary tagging and arranged for forming and handling a VLAN according to IEEE802.1 ad secondary tagging,
the train control and management network (14) forms a first VLAN (V1) which is once labeled according to IEEE802.1Q and to which the control unit (22) is connected as a terminal device of the train control and management network (14),
establishing an IEEE802.1Q once tagged VLAN (V3) between the first control unit (22) and the second control unit (24) via the backplane bus 62, the control unit (22) being capable of communicating with and controlling the control unit (24) over the IEEE802.1Q once tagged VLAN, and
a first VLAN (T1) labeled twice as IEEE802.1 ad is established between the first network switch (32) and a second network switch (34) via a backplane bus (62).
2. Automation system (1) according to claim 1, wherein,
the first section of the train control and management system network (14) comprises a single terminal device (18) of the train control and management system network (14) or comprises a sub-network via which a plurality of terminal devices (18) of the train control and management system network (14) are connected and via which
The second section of the train control and management system network (14) comprises a single terminal device (18) of the train control and management system network (14) or comprises a sub-network via which a plurality of terminal devices (18) of the train control and management system network (14) are connected.
3. The automation system (1) as claimed in any of claims 1 to 2, wherein the first component further has:
a fifth communication interface (44) which is connected to a first section of a communication network (12) which forms a second VLAN (V2) which is labeled once according to IEEE802.1Q and to which a control unit (22) is connected as a terminal,
and the automation system (1) has a third component (6),
wherein the third component (6) has:
a third control unit (26) which is provided for controlling and monitoring the third component (6),
a sixth communication interface (48) connected with a first section of a communication network (12),
a seventh communication interface (49) connected with a backplane bus (62),
a third network switch (36) interconnecting the sixth communication interface (48), the seventh communication interface (49) and the third control unit (26) such that data communication is enabled according to an Ethernet protocol,
wherein an IEEE802.1Q once tagged VLAN (V3) is established between the first control unit (22) and the third control unit (26) via the backplane bus 62, via which the first control unit (22) is able to communicate with and control the third control unit (26), and
a second VLAN (T2) labeled twice as IEEE802.1 ad is established between the first network switch (32) and a third network switch (36) via a backplane bus (62).
4. Automation system (1) according to claim 3,
the first section of the communication network (12) comprises a single terminal device (16) of the communication network (12) or comprises a sub-network via which a plurality of terminal devices (16) of the communication network (12) are connected and
the second section of the communication network (12) comprises a single terminal device (16) of the communication network (12) or comprises a sub-network via which a plurality of terminal devices (16) of the communication network (12) are connected.
5. The automation system (1) according to one of claims 1 to 4, wherein the automation system (1) has a fourth component (8),
wherein the fourth component (8) has:
a fourth control unit (28) which is provided for controlling and monitoring the fourth component (8) and serves as a terminal device for the CAN bus,
an eighth communication interface (40) which is connected to the first section of the CAN bus and the fourth control unit (28),
a ninth communication interface (50) connected with a backplane bus (62),
a fourth network switch (36) interconnecting the ninth communication interface (50) and the fourth control unit (28) such that data communication is enabled according to an Ethernet protocol,
wherein a VLAN (V3) labeled once in accordance with IEEE802.1Q is established between the first control unit (22) and the fourth control unit (28) via the backplane bus (62), via which the first control unit (22) is able to communicate with the fourth control unit (28) and to control the fourth control unit.
6. The automation system (1) according to one of claims 1 to 5, wherein the first control unit 22 or the second control unit 24 is provided for establishing a second VLAN which is twice tagged according to IEEE802.1 ad.
7. Operating method for an automation system according to one of claims 1 to 2, having the steps:
establishing a VLAN (V3) according to IEEE802.1Q primary tagging between the first control unit (22) and the second control unit (24) via a backplane bus (62), via which VLAN the control unit (22) is able to communicate with and control the control unit (24),
establishing a first VLAN (T1) tagged twice as IEEE802.1 ad between the first network switch (32) and a second network switch (34) via a backplane bus (62),
data traffic is transmitted between the first network switch (32) and the second network switch (34) over the twice-tagged first VLAN (T1) via the backplane bus (62) in accordance with the IEEE802.1Q once-tagged first VLAN (V1).
8. Operating method according to claim 7 for an automation system according to one of claims 3 to 4, further comprising the steps of:
establishing an IEEE802.1Q once tagged VLAN (V3) between the first control unit (22) and the third control unit (26) via a backplane bus (62), the first control unit (22) being capable of communicating with and controlling the third control unit (26) via the IEEE802.1Q once tagged VLAN,
establishing a second VLAN (T2) tagged twice as IEEE802.1 ad between the first network switch (32) and a third network switch (36) via a backplane bus (62),
data traffic of a second VLAN (V2) tagged once in accordance with IEEE802.1Q is transmitted between the first network switch (32) and a third network switch (36) over a backplane bus (62) over the twice tagged second VLAN (T2).
9. Operating method according to one of claims 7 to 8 for an automation system according to claim 5, further comprising the steps of:
establishing an IEEE802.1Q once-tagged VLAN (V3) between the first control unit (22) and a fourth control unit (28) via a backplane bus (62), the first control unit (22) being capable of communicating with and controlling the fourth control unit (28) via the IEEE802.1Q once-tagged VLAN.
10. Computer program product, which is provided to control an automation system 1 according to one of claims 1 to 6 in such a way that one of the operating methods according to one of claims 7 to 9 is performed.
CN201980035112.1A 2018-06-01 2019-05-23 Automation system, operating method for an automation system, and computer program product Pending CN112313586A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP18175556.2A EP3575899B1 (en) 2018-06-01 2018-06-01 Automation system, operating method for automation system and computer program product
EP18175556.2 2018-06-01
PCT/EP2019/063379 WO2019228911A1 (en) 2018-06-01 2019-05-23 Automation system, operating method for automation system, and computer program product

Publications (1)

Publication Number Publication Date
CN112313586A true CN112313586A (en) 2021-02-02

Family

ID=62684578

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201980035112.1A Pending CN112313586A (en) 2018-06-01 2019-05-23 Automation system, operating method for an automation system, and computer program product

Country Status (5)

Country Link
US (1) US20210213982A1 (en)
EP (1) EP3575899B1 (en)
CN (1) CN112313586A (en)
HR (1) HRP20210897T1 (en)
WO (1) WO2019228911A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020121644A1 (en) 2020-08-18 2022-02-24 Weidmüller Interface GmbH & Co. KG Modular input and output station for an industrial automation system and/or industrial IoT system
CN112918518B (en) * 2021-03-19 2022-11-22 中车青岛四方车辆研究所有限公司 Vehicle-mounted lumped electronic control platform
CN113291351B (en) * 2021-06-17 2023-01-24 中车唐山机车车辆有限公司 Train formation, train data transmission method and device, and storage medium

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101154103A (en) * 2006-09-29 2008-04-02 费舍-柔斯芒特系统股份有限公司 Method for intercontroller communications in a safety instrumented system or a process control system
CN101320313A (en) * 2008-06-26 2008-12-10 华为技术有限公司 Memory apparatus
US20130286820A1 (en) * 2012-04-30 2013-10-31 Hermann Angst Communication Device For An Industrial Communication Network Which Can Be Operated In A Redundant Manner And Method For Operating A Communication Device
CN103580970A (en) * 2012-07-26 2014-02-12 中国北车股份有限公司大连电力牵引研发中心 Communication board card based on VME bus and data communication method
CN104461968A (en) * 2014-11-21 2015-03-25 华为技术有限公司 I/O channel allocation method and device
CN205647560U (en) * 2016-05-16 2016-10-12 中车青岛四方车辆研究所有限公司 City rail vehicle braking system ethernet communication board
US20160308651A1 (en) * 2015-04-17 2016-10-20 Phoenix Contact GmbH Co. KG Automation device for the redundant control of a bus subscriber
CN106789747A (en) * 2015-11-19 2017-05-31 中车大连电力牵引研发中心有限公司 Interchanger and communication system with multiple gateway function
CN106797270A (en) * 2014-10-07 2017-05-31 华为技术有限公司 It is used for the system and method for commutating in photon count statistic
CN107911288A (en) * 2017-11-22 2018-04-13 中车大连电力牵引研发中心有限公司 Train Communication Adapter and Train Control management system
CN108008657A (en) * 2016-10-28 2018-05-08 北京计算机技术及应用研究所 A kind of direct-connected load balancing redundancy exchange system of control panel and power board bus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011082965A1 (en) * 2011-09-19 2013-01-24 Siemens Aktiengesellschaft Method for operating a network arrangement and network arrangement
DE102012220396B4 (en) * 2012-11-08 2019-06-27 Trumpf Werkzeugmaschinen Gmbh + Co. Kg System and method for servicing a machine tool
DE102014226994A1 (en) * 2014-12-29 2016-06-30 Robert Bosch Gmbh Communication system for operating a data network

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101154103A (en) * 2006-09-29 2008-04-02 费舍-柔斯芒特系统股份有限公司 Method for intercontroller communications in a safety instrumented system or a process control system
CN101320313A (en) * 2008-06-26 2008-12-10 华为技术有限公司 Memory apparatus
US20130286820A1 (en) * 2012-04-30 2013-10-31 Hermann Angst Communication Device For An Industrial Communication Network Which Can Be Operated In A Redundant Manner And Method For Operating A Communication Device
CN103580970A (en) * 2012-07-26 2014-02-12 中国北车股份有限公司大连电力牵引研发中心 Communication board card based on VME bus and data communication method
CN106797270A (en) * 2014-10-07 2017-05-31 华为技术有限公司 It is used for the system and method for commutating in photon count statistic
CN104461968A (en) * 2014-11-21 2015-03-25 华为技术有限公司 I/O channel allocation method and device
US20160308651A1 (en) * 2015-04-17 2016-10-20 Phoenix Contact GmbH Co. KG Automation device for the redundant control of a bus subscriber
CN106789747A (en) * 2015-11-19 2017-05-31 中车大连电力牵引研发中心有限公司 Interchanger and communication system with multiple gateway function
CN205647560U (en) * 2016-05-16 2016-10-12 中车青岛四方车辆研究所有限公司 City rail vehicle braking system ethernet communication board
CN108008657A (en) * 2016-10-28 2018-05-08 北京计算机技术及应用研究所 A kind of direct-connected load balancing redundancy exchange system of control panel and power board bus
CN107911288A (en) * 2017-11-22 2018-04-13 中车大连电力牵引研发中心有限公司 Train Communication Adapter and Train Control management system

Also Published As

Publication number Publication date
WO2019228911A1 (en) 2019-12-05
EP3575899B1 (en) 2021-03-17
US20210213982A1 (en) 2021-07-15
EP3575899A1 (en) 2019-12-04
HRP20210897T1 (en) 2021-08-20

Similar Documents

Publication Publication Date Title
CN102084625B (en) Communication module and method for connecting an electrical device to a network
US7003563B2 (en) Remote management system for multiple servers
CN106789679B (en) Line card frame, multi-frame cluster router, route selection method and message processing method
CN112313586A (en) Automation system, operating method for an automation system, and computer program product
US6678268B1 (en) Multi-interface point-to-point switching system (MIPPSS) with rapid fault recovery capability
US6426952B1 (en) Multi-interface point-to-point switching system (MIPPSS) having an internal universal signal format
US10497252B2 (en) Fire alarm system
US20220345401A1 (en) Video router
US6580720B1 (en) Latency verification system within a multi-interface point-to-point switching system (MIPPSS)
US20150156117A1 (en) High density server system
CN101150451A (en) A monitoring system for single board status of network device and its monitoring method
US5870566A (en) Port expansion network and method for lan hubs
US7737573B2 (en) Power over ethernet combiner
EP2197218B1 (en) A shared bus distributed intercross device
KR20180123627A (en) Automation system and method for operation
CN1984003B (en) Distributed communication equipment architectures and techniques
US5621893A (en) System for expanding ports wherein segment switch selectively associates plurality of hubs coupled to first arbiter and plurality of hubs coupled to second arbiter
CN1988530A (en) Remote control and control redundancy for distributed communication equipment
US6628648B1 (en) Multi-interface point-to-point switching system (MIPPSS) with hot swappable boards
US8972643B2 (en) Field bus network adapter and field bus network subscriber with field bus connections
US6526048B1 (en) Multi-interface point-to-point switching system (MIPPSS) under unified control
US7742434B2 (en) Ethernet chaining method
US6580692B1 (en) Dynamic switch path verification system within a multi-interface point-to-point switching system (MIPPSS)
US11815871B2 (en) I/O network module with unique network address
Toillon et al. An optimized answer toward a switchless avionics communication network

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination